Improvement in door-locks



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L l MoNRo'E'roornorNORTHAMPTON,MAssAcHUsETTsAssIGNoR lTOHIMSELF,VVILLlAM M. GAYLORLLZAND ELN.. FOUTE.

` Laws Patent No. 89,753, Ma/JA, 1869.'

' IMPROVEMENT nv boonmocxs.

The Schedule referred to in these Letters Patent and makingV part uf the saine,

`To all persons to whom these .presents may comer Be it known that .1, Mormon B. Foorn, of Northampton, in the county of Hampshire, and State of Massachusetts, have invented a new and useful Improvement in MortiseLocks for Doors and I db herebydeclare 4the same to be fully described in the following specicatiomand represented in' the accom- Fignre 1 exhibits a view of my improved lock as it appearswith the cap removed from the rest of its case.- l y Figure e is an inner side view of such cap.

Figure 3 is a transverse section of the dock.

Figure iis a side view of its key.

The body of the case is cylindrical, thecap, shown in'iig. 2, and also in This cylindrical body projects from a plate, e, which,

`when the lock is let intov'a door, is `toA bev fastened ,to

the door by screws. l e

The `case contains a slotted bolt, B, it'` having a yrectamkggular slot made through it, as shown at d.

Projectingrdown from the upper side of the slotis a rib, e, provided-witha triangular-shaped stop, f, and also with a notch, g, the two being formed and arranged inmanner as represented, i y

"The key-holes ofv the case are shown at h i.

Figure 5 exhibitsa top view, and

Figure `6, a rear elevation of thebolt.

Figure 7 is a rear-end view of it.l

' /Avspring-catch, k, formed as shown in top view in Figure 8, projects from the rearend ofthe lock-case, and bears against the stop j, and serves with such stop to hld the bolt` in its advance, as well as in its rearmost position. Y b

A lever or tumbler, l, pivoted to the bolt by a pin,

` m, projecting therefrom, has vits longer arm extended in to a. passage, '0, which goeslthrough award-case, C, encompassing a rotary key-receiver,` D.

The -said longer arm is also' provided with a hook or catch, x, to latch upon the ward-block.;'

The rib also extends into the passage o. e The ward-block or case Gis formed in'two separate parts, p q, one of which` is attached to the 'lock-case and the other to the cap, and within-.them is a cylindrical chamber, V'r, provided at its opposite ends with' the key-holes h t'. '1

The chamber is concen 'c with the key-receiver D, which is a cylinder pivot'ed at its opposite ends in the ends of the chamber, and provided with grooves, s s, running lengthwise through its opposite sides, such grooves being to 'receivethe prongs t t of the-.bifurcated key, which is made of thin plate-steel, and has a side view, as shown in iig. 4, in' which each of the prongs is `shown as provided with a series of notches, u.

Projecting from the fig.' 3, at b, `constituting part'of inner curved surfabe of, the'.

ward-block is a series of annular wards orfring-sections, o 'c c, which enter the notches lul of the prongs of the key, while the key is in the act of beingre- .volved i l z v These wards and notches are for safety,'and to prevent any other key whose notches may not be arranged in -correspondencewith the wards from being used in the lock.

When thekey is in the key-receiver, and is being l l revolved for the purpose of throwing the bolt, suchkey will act directly against ,the side of the key-notch y in the bolt.

In throwing back the bolt, the key also irst acts against the tumbler and raises it out of enlatchment., with the ward-block, for vwhen the bolt is yadvanced to its extreme position,the tumbler latches on the front of the ward-block, so as to hold-the bolt inits forward position.

On the frontfarm of ythe tumbler being raised by the key, the rear arm of such tumbler will be borne down upon the spring-catch la, so as t'o depress it, and thereby facilitate the retreat of the bolt. Y j Within the lock-case 4i a small bolt, y, provided with a spring, z, for advancing it; f

This bolt passes into the ward-block, and enters one of the grooves of the key-receiver D, and serves to hold it stationary while the key is out of it, vthe same being to hold the v grooves ofy the vreceiver iii-their proper position, with respect to the key-holes, to enable the key, after having been inserted. in either hole, to enter the receiver.Y

Whilepassing into the receiver, the bevel e .of one 5 ,of the prongs of the'key will -be pushed against the end of the bolt y, and will force the said bolt back out of the receiver, so as to enable the receiver to revolve with the key, and preserve such key in its due relaf tion with the wards.

In a patent, 84,484, `granted December 1, 1868, on

aninvention madeby me, such being an improvement in mortise-locks, the case, thebolt, andthespringcatch, were substantially like those hereinbefore de"V scribed;

In such lock, there was also a-lever like the tumbler Z hereinbei'ore mentioned, its purpose being sim- 'hook to catch on the ward-case and hold the bolt for- V ward.v

I, therefore, herein makeno claim to thecombination.v and arrangement of thelever l'with the camsto'p f, the spring-catch lo, andthe slotted bolt and its case; nor do I claim the combination of alcatch-tumi bierv and"v stud with a bolt and case, thev said catchtumbler .being to hold 'thebolt in an advanced state,

y a stud for the hook to catch upon, such ward-block or stud beingprojected from the case.

2. I also claim the ward-block or case, as con- `structed in two separate parts, p q, and having one of such parts attached to the cover, and the other to the casehof the lock.

3. I also claim the ward-block, as made with the annular Wards and the bolt-rib passage o going through it, as set forth.

. M. B. FOOTE. Witnesses:

J. H. SMITH, L. K. LELAND. 

